Arthur w



A. W. F. STENZEL.

- -SCREW MACHINE.

APPLICATION FILED IAN. Io. 1919.

Patented Oct. 14

1,318,510. @l- Y f? Z@ I /9 535g 'M5 attomwas UNITED sTATEs PATENT onnion.

ARTHUR W. r. sTENzEL, or NEW Yonx, N. Y.;

SCREW-MACHINE,

Toy all 'whom it may concern: Y

Be it known that I, ARTHUR F. STENf znL, a citizen of Germany, and residing at.

New York, inthe county of New York and State of New York, have invented certain` new and. useful Improvements in Screw,-

Machines, ofwhich the following is a speciiicationVsuchV as will enable those skilled inthe art to Vwhich it appertains to makev and use the same.

This invention relates yto Y what'` are known.` as screw machlnes, or machines, which em-` ployfa screw sha-ft for adjusting the position of the tool holderslide used therein; and the object Aofzthe invention is to provide means Y whereby thecexact extent toA which the shaft mustbe turned li-n order toy secure the desired adjustment ofjthe tool `holder slide may be determined and indicated on atsuitable indiv-l cating -dial .or gage device, and all guess work as to the extent ofthe movement of said shaftrin order to lSecuresuchY adjust-y ment, or all: movements of said shaft in order to accomplish such adjustments in which the operator is guided only by his opinion are obviated; and with these and` other objectsl in. view the invention consists in the construction, ,combination and arfy rangement of parts hereinafter' described and claimed. Y, The invention is fully disclosed in the following specification, of which the accompanying 4drawing forms a part, iny which the separate parts of my improvement are designated by suitable referencey characters in each oftheviews, and kin which t- .Figure 1 isa central longitudinal section of apart Lof a screw machineand showing a sectional view` .0f my improved indicator de-v vice; .v Y. Fig. 2 a plan'view of part of the construcf i tion asshownin Figll;

Fig. 3 a partial section on the line 3,-3 of Fig. .1;fand,n y L j Fig. 4l adetail of a part ofthe screw shaft employed.A Y 'f c InFig. y1 of the drawing,I havediagrani-k.

niatically indicated at. lthejfframework of what is known as an automatic fscrewvma-Vv which, the gear 2G operatesas Specification of Letters Patent. 14,1919 Application mea January 10,1919. y seria1No.2 7o,511. A

thrughtheend members V10 of saidbox shaped portion. A.

, Itwillbe understood that the frame 5 and tool'holde'r slide -6 as well as theshaft 8V may be of. the usual or any desired form and construction but I preferably employl the hollow box-shaped portion-9 at the `top of the'frame to provide a Vchamber or compart-V ment 11 through whichathread-like gearv 12 secured tothe shaft 8 approximately,

centrally thereof is free-to pass. The *geary Y 12 is made in the form of a'threadthe-.pitch of which corresponds to the ypitchfof'the screw shaft 8 asis clearly illustrated inFigs. 1 and 4 of the drawing. i l 1 In practice I secure to thev top oftheboxf Y shaped portion 9 of the frame 5, `acylin.-3 Vdricali casin'g13 having fanyelongated and,

reduced base portion 14 having aV base flange 15 through which are ypassed screws -or similar devices 16 forsecuring the casing'13ftoA 18 having a raised externally threaded iange 19 onfwhich is 'mounted an'annular ring 2OV between" which and the top of the fiange 19 is placed a transparent disk-21 c preferably ycomposed kTof non-breakable ma terial. v

. Vnoaabiy,moulitai ai thek tettoia 'ofthe elongated portion15 centrally thereof is an elongated gear or pinion 22k abovawhich ya shaft 23 is rotatably mounted in Ythe casingV Y 13 to twhich shaft issecured a, gear 24-which meshes with ,the gear.. orvpinion 22. ffSeCured to the shaft 23 adjacenttothe gear24 is a smaller gearl 25 which meshes .with a' larger gear 26 secured to .a shaft 27 rotatably Y mounted in the casing 13. above the shaft 23.

Rotatably mounted in lthev transverse top plate 18. of the casing 13 centrally thereof is a stud-28 tothe bottom of which is secured a disk 29 andto the top 'ofwhich issecured a pointer arm 30. Securedto theldisk 29, or

the lbottom face thereof, is an annular gear rack/31y with which, joint in connection ,With

tratedin Fig; lgof thedrawing.

clearlyjijlluss The itop faceof the transverse top;Y plate 1.8* isV providedy with a circularly arranged scale'32 havingscalemarks from y0 to 24j inclus1vesubd1v1ded byn other scale marks,

which indicate Vhalves er fractions 'offthe scale marks O to 24 inclusive. In practice I preferably provide the free end of the screw shaft 8 with a thumb and finger piece 33 whereby said shaft may be rotated in the usual manner. i

From the foregoing description it is believed that my invention will be readily" understood by those skilled in the art to which it appertains on a consideration of the accompanying drawing and the following statement. Y

TVith the parts in the position shown in the accompanying drawing if it be desired to adjust the tool holder slide 6 in the direc tion of the arrow m two thousandths. The screw shaft S will be rotated in the direction of the arrow y in Fig. 1, which operation will rotate the gear or pinion 22 through the gear 12, which gear slides longitudinally of the gear or pinion 22 in its operation, and the pointer or pointer arm 30 will be rotatedthrough the gears 2i, 25, 26 and rack 31 on the disk 29, and this operation will-be continued until the pointer or pointer arm 30 moves from the position shown in full lines in Fig. 2 to that'indicated in dotted lines in said gure, or to the numeral 2 on theZ scale 32 which indicates two thousandths.

If, however, it be desired to move the tool holder slide 6 two thousandths in the directionY of the arrow m2 in Fig. 1, the screw shaft 8 will be rotated in the direction of the arrow 172, which operation will move the pointer or pointer arm 30 in the opposite direction from that above described, until it reaches the scale mark 23 which is two thouandths from the position of the pointer or pointer arm 30 as indicated in full lines in In other Vwords my improved device indicates any desired adjustment of the tool holder slide 6 from one to twenty-five thousandths when the screw shaft 8 is rotated in thek desired direction and the pointer arm 30 is rotated through the gears 12, 22, 24, 25 and 26 and the rack 31; the gear 12 slides longitudinally of the gear or pinion 22 in this movement as hereinbefore stated.

While I have shown certain rdetails of construction for carrying my invention into effect and a specific gear arrangement for transmitting the movement of Y the screw shaft 8 to a-suitabl'e indicator, my invention is not limited t0 these details. of construction and various changes therein and modifications thereof may be made, within the scope of the appended claims, without departing from the spirit of my invention or sacrificing its advantages. i

From the foregoing it ywill be understood` that the casing 1 0 and thevarious parts thereof form a gageor indicating device which is operated when the tool holder slide 6 is adjusted through the screw shaft 8,

vv-Having fully described my invention,

what I claim as new and-desire to secure by Letters Patent, 1s

1. A machine of the class described, comprising a frame, a screw shaft mounted in said frame, a tool holder slide mounted in said frame and connected with one end of said shaft, van indicating device mounted on the frame in juxtaposition to said shaft and comprising a casing having a graduated dial in connection with Vwhich a pointer operates, and means for .gearing the pointer in connection with said shaft.

2. A machine of the class described, comprising a frame, a screw shaft mounted 1n said frame, a tool holder slide mounted in said frame and connected with one end of said shaft, a gear mounted on the screw shaft approximately centrally thereof, an indicating device mounted on the frame in juxtaposition to the gear on saidscrew shaft, said device comprising a casing the bottom of which is open and the top of which is closed and provided with an annular scale, a pointerl rotatably mounted in the top of the casing and adapted to operate in connection lwith said scale, and means for placing the pointer and the gear on the screw shaft in operative connection.

3. A machine of the class described, comprising a frame, a screw shaft mounted in said frame, a tool holder slide mounted in said frame and connected with one end of said shaft, a gearmounted on the screw shaft approximately centrally thereof, an indicating device mounted on the frame in juxtaposition to the gear on said screw shaft, an elongated gear mounted in the bottom portion of the casing and in operative con nection with the gear 011 the screw shaft, a pointer rotatably mounted in the top of the casing and adapted to operate in connection with said scale, and other gears mounted in said casing and in operative connection with said elongated gear for rotating saidpointer.

1. A machine of the class described, comprising a frame, a screw shaft mountedin said frame, a toolA holder slide mounted in said'frame and connected with one en d of said shaft, a gear mounted on the screw shaft approximately centrally thereof, an indicating device mounted on the frame in juxtaposition to the gear on said screw shaft, said device comprising a casing the bottom ofwhich is open and the top of which is closed and provided with an annular scale, a disk rotatably mounted in the top of the casing approximately centrally thereof and thebottom face of which isprovided with an annular gear rack, a pointer arm connected with said disk and mounted on the upper face of the top of the casing and adapted to operate vin connection with said scale, an elongated gear .rotatably mounted in the bottom `portion .of the casing4 and in operative `connection with the gear'on said screwT shaft and other gears rotatably mounted in the casing andadapted to placesaid elongated gear andv said gear rack in operative connection whereby the rotarymovement of the screw shaft Will be transmitted to said pointer arm.

V5. A machine lof the classk described oom-V prising a frame provided vvithl a box-shaped portion, a screw shaft mounted inrsaid boxshaped portion, a tool holder slidemounted in said frame and eonneotedwith one end of said shaft, a thread-like gear mounted on the screw shaft Within the box-shaped portion,

an indicating device ysecured tothe top of the box-shaped portion of the frame, said device comprising a cylindrical casing having areduced elongated base portion the bottom or reduced portion of the casing;y being open and the annular or top portion of which is closed and provided With a de.-

tachable ring for securingk a transparent Sonie: of this patent may ber obtainedlor five` cents each, by addressing panel in place, the top ofthejcasing being ,provided with anv annular scale, a pointer arm rotatably mounted in the top'of the casi ing and adapted to'operate in connection yWith said scale and carrying a diskbeneath the ltop lof the casing, jsaid. disk 'being 4loro,- Vvided With an' ann'ulargear rack, an elongatedigear mounted .in the bottom portion of the YCasing and in operative 'connection With the thread-like gear on the screw shaft, and other gears rotatably mounted 'in the casing and adapted to place said elongated gear, and gear rack 1n operative connection.V

In testimony that IV claim the foregoing aS my invention I have signed my name in presence of the subscribing Witnesses thi Washington', D. GJ?

the Commissioner of Patents. l 

